CVE-2026-31833

Umbraco is an ASP.NET CMS. From 16.2.0 to before 16.5.1 and 17.2.2, An authenticated backoffice user with access to Settings can inject malicious HTML into property type descriptions. Due to an overly permissive attributeNameCheck configuration /.+/ in the UFM DOMPurify instance, event handler...

Umbraco.Forms has Path Traversal and File Enumeration Vulnerabilities in Linux/Mac

Impact It's possible for an authenticated backoffice-user to enumerate and traverse paths/files on the systems filesystem and read their contents, on Mac/Linux Umbraco installations using Forms. As Umbraco Cloud runs in a Windows environment, Cloud users aren't affected. Patches This issue affect...

CVE-2026-24687

Umbraco Forms is a form builder that integrates with the Umbraco content management system. It's possible for an authenticated backoffice-user to enumerate and traverse paths/files on the systems filesystem and read their contents, on Mac/Linux Umbraco installations using Forms. As Umbraco Cloud...

PT-2026-5347

Umbraco Forms is a form builder that integrates with the Umbraco content management system. It's possible for an authenticated backoffice-user to enumerate and traverse paths/files on the systems filesystem and read their contents, on Mac/Linux Umbraco installations using Forms. As Umbraco Cloud...

Sensitive Information Disclosure

Umbraco.cms is vulnerable to Sensitive Information Disclosure. The vulnerability is due to unsafe handling and cleanup of temporary files during the dictionary upload process, which allows an attacker with backoffice access to infer the existence of arbitrary files on the server and, in some...

CVE-2025-66625

Umbraco is an ASP.NET CMS. Due to unsafe handling and deletion of temporary files in versions 10.0.0 through 13.12.0, during the dictionary upload process an attacker with access to the backoffice can trigger predictable requests to temporary file paths. The application’s error responses HTTP 500...

CVE-2025-66625

CVE-2025-66625 affects Umbraco CMS (ASP.NET) versions 10.0.0–13.12.0. During the dictionary upload process, unsafe handling/deletion of temporary files enables a backoffice attacker to trigger predictable requests to temporary file paths, causing error responses (HTTP 500 if a file exists, 404 if...

CVE-2025-66625 Umbraco Vulnerable to Improper File Access and Credential Exposure through Dictionary Import Functionality

Umbraco is an ASP.NET CMS. Due to unsafe handling and deletion of temporary files in versions 10.0.0 through 13.12.0, during the dictionary upload process an attacker with access to the backoffice can trigger predictable requests to temporary file paths. The application’s error responses HTTP 500...

CVE-2025-66625 Umbraco Vulnerable to Improper File Access and Credential Exposure through Dictionary Import Functionality

Umbraco is an ASP.NET CMS. Due to unsafe handling and deletion of temporary files in versions 10.0.0 through 13.12.0, during the dictionary upload process an attacker with access to the backoffice can trigger predictable requests to temporary file paths. The application’s error responses HTTP 500...

Umbraco Vulnerable to Improper File Access and Credential Exposure in Dictionary Import Functionality

Impact Due to unsafe handling and deletion of temporary files during the dictionary upload process, an attacker with access to the backoffice can trigger predictable requests to temporary file paths. The application’s error responses HTTP 500 when a file exists, 404 when it does not allow the...

PT-2025-50229

Name of the Vulnerable Software and Affected Versions Umbraco versions 10.0.0 through 13.12.0 Description Umbraco, an ASP.NET CMS, experiences an issue related to the unsafe handling and deletion of temporary files during the dictionary upload process. An attacker with backoffice access can...

CVE-2024-35218

Umbraco CMS is an ASP.NET CMS used by more than 730.000 websites. Stored Cross-site scripting XSS enable attackers that have access to backoffice to bring malicious content into a website or application. This vulnerability has been patched in versions 8.18.13, 10.8.4, 12.3.7, 13.1.1 by implementi...

CVE-2023-38694

Umbraco is an ASP.NET content management system CMS. Starting in version 8.0.0 and prior to versions 8.18.10, 10.7.0, and 12.1.0, a user with access to a specific part of the backoffice is able to inject HTML code into a form where it is not intended. Versions 8.18.10, 10.7.0, and 12.1.0 contain ...

CVE-2024-51995 Logic bug in ajax.render.php allows for bypass of 'backOffice' access control in Combodo iTop

Combodo iTop is a web based IT Service Management tool. An attacker can request any route we want as long as we specify an operation that is allowed. This issue has been addressed in version 3.2.0 by applying the same access control pattern as in UI.php to the ajax.render.php page which does not...

SQL Injection

Overview Affected versions of this package are vulnerable to SQL Injection due to a particular API endpoint modification by authenticated backoffice users, which allows the inclusion and execution of arbitrary SQL commands without proper sanitization or validation. An attacker can manipulate...

GHSA-CFR5-7P54-4QG8 Privilege Escalation using Spoofing

Impact Users with low privileges Editor, etc are able to access some unintended endpoints. Explanation of the vulnerability Possible to delete redirect urls, when disabled by admin with only access to backoffice Possible to access the examine dashboard with only access to backoffice Possible to...

Possible injection of HTML into user invite mails

Impact A user with access to a specific part of the backoffice is able to inject HTML code into a form where it is not intended. Explanation of the vulnerability A person with access to the backoffice and the "users" section could send a user invite and inject HTML code into the invite message...

PT-2023-31146 · Microsoft · Asp.Net

Name of the Vulnerable Software and Affected Versions: Umbraco versions 7.0.0 through 7.15.10 Umbraco versions 8.0.0 through 8.18.8 Umbraco versions 10.0.0 through 10.6.9 Umbraco versions 11.0.0 through 11.4.9 Umbraco versions 12.0.0 through 12.1.9 Description: Umbraco is an ASP.NET content...